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下列句子排序,恰当的一项是(　　)①风刮来的泥沙已将它弥合。②船底,一道裂缝从船头直达船尾。③歇脚的鸟儿将湖里的鱼虾变成白色粪便,屙在上面。④废弃的木船俯在岸边的山坡上,在草和灌木丛间悄悄朽烂。⑤一枝野菊花从中长出来,在船肚上举着几朵金黄。

__, they went on working.

They____on the program for almost one month before l was arranged to help them. Now, we____on it as no result has come out.